Variable Frame Rate Speech Coding Using Optimal Interpolation
نویسندگان
چکیده
منابع مشابه
Techniques for Variable Rate Speech Coding Using
This paper presents two techniques for variable rate speech coding using wavelet representations. In the rst method, the Daubechies wavelet is used to produce a wavelet representation of the speech signal. This representation is encoded using some of the properties of the speech signal to allocate bits to the various subbands. A technique to lower the bit rate using vector quantisation is discu...
متن کاملVariable Frame Rate for Very Low Bit-Rate Video Coding
Motion description of objects time evolution is often bit-rate wasting even if computed at a low fixed ffame rate. Bit-rate reduction can be achieved taking advantage of the inactivity periods: in such time intervals there is no need for motion coding, as an accurate description of the scene can be obtained only considering the frame diflerence information. We propose to estimate the motion bet...
متن کاملVariable Rate Speech Coding Using Discrete Time Waveletextrema
We describe a novel procedure for variable rate encoding of a speech signal starting from the discrete time wavelet extrema representation. We describe the bit reduction achievable by thresholding the extrema signal. We also demonstrate that the thresholding procedure provides a \denoising" eeect. We then reduce the bit rate further by using a bit allocation scheme that adopts a model for the e...
متن کاملImproved H.263+ Rate Control via Variable Frame Rate Adjustment and Hybrid I-Frame Coding
A novel rate control algorithm consisting of two major components , i.e. a variable encoding frame rate method and a hybrid DCT/wavelet I-frame coding scheme, is proposed in this work for low bit rate video coding. Most existing rate control algorithms for low bit rate video focus on bit allocation at the macroblock level under a constant frame rate assumption. The proposed rate control algorit...
متن کاملRepresenting Voiced Speech Using Prototype Waveform Interpolation for Low-rate Speech Coding
In recent years, research in narrow-band digital speech coding has achieved good quality speech coders at low rates of 4.8 to 8.0 kb/s. This thesis examines the method proposed by W.B. Kleijn called prototype waveform interpolation (PWI) for coding the voiced sections of speech efficiently to achieve a coder below 4.8 kb/s while maintaining, even improving, the perceptual quality of current cod...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 1994
ISSN: 0090-6778,1558-0857
DOI: 10.1109/26.293669